--- a/testing/mozharness/configs/releases/postrelease_esr38.py
+++ b/testing/mozharness/configs/releases/postrelease_esr38.py
@@ -7,13 +7,14 @@ config = {
         {"file": "config/milestone.txt"},
     ],
     "repo": {
         "repo": "https://hg.mozilla.org/releases/mozilla-esr38",
         "branch": "default",
         "dest": "mozilla-esr38",
         "vcs": "hg",
     },
+    "vcs_share_base": "/builds/hg-shared",
     "push_dest": "ssh://hg.mozilla.org/releases/mozilla-esr38",
     "ignore_no_changes": True,
     "ssh_user": "ffxbld",
     "ssh_key": "~/.ssh/ffxbld_rsa",
 }

--- a/testing/mozharness/configs/releases/postrelease_firefox_beta.py
+++ b/testing/mozharness/configs/releases/postrelease_firefox_beta.py
@@ -2,13 +2,14 @@ config = {
     "log_name": "bump_beta",
     "version_files": [{"file": "browser/config/version_display.txt"}],
     "repo": {
         "repo": "https://hg.mozilla.org/releases/mozilla-beta",
         "branch": "default",
         "dest": "mozilla-beta",
         "vcs": "hg",
     },
+    "vcs_share_base": "/builds/hg-shared",
     "push_dest": "ssh://hg.mozilla.org/releases/mozilla-beta",
     "ignore_no_changes": True,
     "ssh_user": "ffxbld",
     "ssh_key": "~/.ssh/ffxbld_rsa",
 }

--- a/testing/mozharness/configs/releases/postrelease_firefox_esr45.py
+++ b/testing/mozharness/configs/releases/postrelease_firefox_esr45.py
@@ -6,13 +6,14 @@ config = {
         {"file": "config/milestone.txt"},
     ],
     "repo": {
         "repo": "https://hg.mozilla.org/releases/mozilla-esr45",
         "branch": "default",
         "dest": "mozilla-esr45",
         "vcs": "hg",
     },
+    "vcs_share_base": "/builds/hg-shared",
     "push_dest": "ssh://hg.mozilla.org/releases/mozilla-esr45",
     "ignore_no_changes": True,
     "ssh_user": "ffxbld",
     "ssh_key": "~/.ssh/ffxbld_rsa",
 }

--- a/testing/mozharness/configs/releases/postrelease_firefox_release.py
+++ b/testing/mozharness/configs/releases/postrelease_firefox_release.py
@@ -6,13 +6,14 @@ config = {
         {"file": "config/milestone.txt"},
     ],
     "repo": {
         "repo": "https://hg.mozilla.org/releases/mozilla-release",
         "branch": "default",
         "dest": "mozilla-release",
         "vcs": "hg",
     },
+    "vcs_share_base": "/builds/hg-shared",
     "push_dest": "ssh://hg.mozilla.org/releases/mozilla-release",
     "ignore_no_changes": True,
     "ssh_user": "ffxbld",
     "ssh_key": "~/.ssh/ffxbld_rsa",
 }